EP 0100500 B1 19860507 - PROCESS FOR THE SEPARATION OF CATALYSTS FROM POLYPHENYLENE ETHERS
Title (en)
PROCESS FOR THE SEPARATION OF CATALYSTS FROM POLYPHENYLENE ETHERS
Publication
Application
Priority
DE 3228662 A 19820731
Abstract (en)
[origin: US4482705A] High molecular weight polyphenylene ethers are prepared from monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a copper salt and an organic amine by a method wherein the metal component of the catalyst is separated off, after the polymerization, by the addition of a polymeric polycarboxylic acid which is essentially composed of unsaturated monofunctional or difunctional carboxylic acids and/or their anhydrides. Advantageously, the polymeric polycarboxylic acids used are homopolymers or copolymers of (a) from 50 to 100% by weight of one or more unsaturated monofunctional acids of 3 to 10 carbon atoms and/or one or more difunctional acids or their anhydrides of 4 to 6 carbon atoms and from 0 to 50% by weight of one or more monomers which do not possess an acid function and can be copolymerized with (a).
IPC 1-7
IPC 8 full level
C08G 65/46 (2006.01)
CPC (source: EP US)
C08G 65/46 (2013.01 - EP US)
Citation (examination)
Ullmanns Encyklopädie der technischen Chemie, 4.Aufl. Band 13, 1977, Seite 281
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0100500 A1 19840215; EP 0100500 B1 19860507; DE 3228662 A1 19840202; DE 3363393 D1 19860612; US 4482705 A 19841113
DOCDB simple family (application)
EP 83107241 A 19830723; DE 3228662 A 19820731; DE 3363393 T 19830723; US 51861283 A 19830729